The lack of diversity in children’s publishing is still a problem, something Inclusive Minds tried to rectify by announcing their plans to launch “diversity charters” with ways of making books more inclusive.

She said: “Why spend money on marketing if the reader can’t find your titles via Search? Who in your company who knows how readers are spelling and misspelling your author names and finding yourtitles? Pull a list of top searches and null search results from your own website and have a look.”

At the conference last year Nicolette Jones of the Sunday Times said she had “reservations” about picture book apps. “I’ve never seen a picture book-app that does something that a book doesn’t do better,” she said.

In a blog post, she said: “Apps are not books, and books are not apps. Successful making of story apps requires an understanding that apps are another country, and we should do things differently there.

The Bookseller Children's Conference will be held on 29th September 2015, with speakers including Nosy Crow's Kate Wilson, Egmont's Cally Poplak, and Igloo Book's John Styring. For more information and to book visit the website.